Soil erosion / new seeding netting

Anyone have any idea why these nettings are use on new lawns? A new development around here is useing them and they are not Dissolving or eroding after 1 year. It is time for aeration and cant do it with a net on the ground.Thanks Kevin

I'm ***uming the netting is used on a hill or slope. The thing will eventually biodegrade. The question is - how well is the lawn established? If you can see the netting then I am ***uming that its thin. Mayby you can sell overseeding to the customer?